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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#ifndef CVMFS_CATALOG_MGR_CLIENT_H_ |
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#define CVMFS_CATALOG_MGR_CLIENT_H_ |
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#include "catalog_mgr.h" |
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#include <inttypes.h> |
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#include <map> |
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#include <string> |
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#include "backoff.h" |
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#include "crypto/hash.h" |
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#include "gtest/gtest_prod.h" |
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#include "manifest_fetch.h" |
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#include "shortstring.h" |
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class CacheManager; |
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namespace cvmfs { |
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class Fetcher; |
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} |
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class MountPoint; |
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namespace perf { |
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class Counter; |
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class Statistics; |
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} |
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namespace signature { |
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class SignatureManager; |
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} |
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namespace catalog { |
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/** |
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* A catalog manager that uses a Fetcher to get file catalgs in the form of |
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* (virtual) file descriptors from a cache manager. Sqlite has a path based |
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* interface. This catalog manager returns @<FILE DESCRIPTOR> as a path and |
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* thus requires a sqlite vfs that supports this syntax, such as the cvmfs |
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* default vfs for clients. |
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* |
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* This class uses the Fetcher in order to get access to the download manager |
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* and the cache manager, too. It requires a download manager and a signature |
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* manager as it calls manifest::Fetch in order to get the manifest of new and |
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* updated root catalogs. It requires the cache manager to get access to the |
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* Unpin() method of the corresponding quota manager; loaded catalogs need to |
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* be unpinned when the class is destructed. |
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*/ |
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class ClientCatalogManager : public AbstractCatalogManager<Catalog> { |
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FRIEND_TEST(T_CatalogManagerClient, MountLatest); |
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FRIEND_TEST(T_CatalogManagerClient, LoadByHash); |
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FRIEND_TEST(T_CatalogManagerClient, LoadByHashNetworkFailure); |
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FRIEND_TEST(T_CatalogManagerClient, LoadRootCatalog); |
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// Maintains certificate hit/miss counters |
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friend class CachedManifestEnsemble; |
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public: |
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explicit ClientCatalogManager(MountPoint *mountpoint); |
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virtual ~ClientCatalogManager(); |
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bool InitFixed(const shash::Any &root_hash, bool alternative_path); |
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shash::Any GetRootHash(); |
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std::string GetCatalogDescription(const PathString &mountpoint, |
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const shash::Any &hash); |
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bool IsRevisionBlacklisted(); |
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bool offline_mode() const { return offline_mode_; } |
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uint64_t all_inodes() const { return all_inodes_; } |
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uint64_t loaded_inodes() const { return loaded_inodes_; } |
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std::string repo_name() const { return repo_name_; } |
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manifest::Manifest *manifest() const { return manifest_.weak_ref(); } |
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int root_fd() const { return root_fd_; } |
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protected: |
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virtual LoadReturn GetNewRootCatalogContext(CatalogContext *result); |
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virtual LoadReturn LoadCatalogByHash(CatalogContext *ctlg_context); |
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virtual void StageNestedCatalogByHash(const shash::Any &hash, |
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const PathString &mountpoint); |
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void UnloadCatalog(const catalog::Catalog *catalog); |
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catalog::Catalog* CreateCatalog(const PathString &mountpoint, |
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const shash::Any &catalog_hash, |
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catalog::Catalog *parent_catalog); |
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void ActivateCatalog(catalog::Catalog *catalog); |
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private: |
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LoadReturn FetchCatalogByHash(const shash::Any &hash, |
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const std::string &name, |
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const std::string &alt_catalog_path, |
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std::string *catalog_path); |
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/** |
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* Required for unpinning |
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*/ |
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std::map<PathString, shash::Any> loaded_catalogs_; |
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std::map<PathString, shash::Any> mounted_catalogs_; |
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UniquePtr<manifest::Manifest> manifest_; |
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std::string repo_name_; |
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cvmfs::Fetcher *fetcher_; |
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signature::SignatureManager *signature_mgr_; |
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std::string workspace_; |
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bool offline_mode_; /**< cached copy used because there is no network */ |
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uint64_t all_inodes_; |
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uint64_t loaded_inodes_; |
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shash::Any fixed_root_catalog_; /**< fixed root hash */ |
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bool fixed_alt_root_catalog_; /**< fixed root hash but alternative url */ |
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BackoffThrottle backoff_throttle_; |
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perf::Counter *n_certificate_hits_; |
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perf::Counter *n_certificate_misses_; |
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/** |
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* File descriptor of first loaded catalog; used for mapping the root catalog |
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* file descriptor when restoring the cache manager after a fuse module reload |
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*/ |
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int root_fd_; |
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}; |
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/** |
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* Tries to fetch the certificate from cache |
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*/ |
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class CachedManifestEnsemble : public manifest::ManifestEnsemble { |
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public: |
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CachedManifestEnsemble( |
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CacheManager *cache_mgr, |
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ClientCatalogManager *catalog_mgr) |
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: cache_mgr_(cache_mgr) |
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, catalog_mgr_(catalog_mgr) |
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{ } |
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void FetchCertificate(const shash::Any &hash); |
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private: |
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CacheManager *cache_mgr_; |
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ClientCatalogManager *catalog_mgr_; |
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}; |
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} // namespace catalog |
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#endif // CVMFS_CATALOG_MGR_CLIENT_H_ |
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